Search found 19 matches

by openvibeexplorer
Thu Jan 20, 2022 1:17 pm
Forum: Scenarios and BCI design
Topic: Need of p300 speller test data in .ov format
Replies: 2
Views: 5975

Re: Need of p300 speller test data in .ov format

OK. No issues.

Regards,
Swati.
by openvibeexplorer
Thu Jan 20, 2022 5:42 am
Forum: Scenarios and BCI design
Topic: Need of p300 speller test data in .ov format
Replies: 2
Views: 5975

Need of p300 speller test data in .ov format

Hello there, I checked the below site for pre-recorded speller dataset in .ov format. http://openvibe.inria.fr/datasets-downloads/ At the end of the page, there is a "test dataset for speller". This contains a 10 character speller dataset for training and 10 character speller dataset for testing. Is...
by openvibeexplorer
Thu Dec 09, 2021 8:18 am
Forum: Scenarios and BCI design
Topic: Epoch Data Extraction Over Concatenated Files using Python Script
Replies: 2
Views: 6255

Re: Epoch Data Extraction Over Concatenated Files using Python Script

Hello Thomas, Thanks a lot for understanding my issue and confirming it from your side. I am working on a P300 Speller and I am gathering 360 characters data for training a CNN-1D network model. For this I need to concatenate 36 OV files (Each file containing data for 10 characters) Out of 36 files,...
by openvibeexplorer
Thu Dec 02, 2021 2:55 pm
Forum: Tutorial scenarios
Topic: Use of OpenVibe Stimulations for epoching
Replies: 3
Views: 6589

Re: Use of OpenVibe Stimulations for epoching

Hello there, Below is what I assumed and could move forward. I am using C++ terminology to explain my understanding. - "VisualStimulationStart" might be the Base stimulation. - "Target" and "NonTarget" might be the SubClasses of Base stimulation. - Base stimulation "VisualStimulationStart" might be ...
by openvibeexplorer
Wed Dec 01, 2021 11:17 am
Forum: Scenarios and BCI design
Topic: Epoch Data Extraction Over Concatenated Files using Python Script
Replies: 2
Views: 6255

Epoch Data Extraction Over Concatenated Files using Python Script

Hello there, I am stating my issue below: I am dumping the samples in 600 msec epoch after every stimulation, into an excel sheet using python. I have a sampling frequency of 256 Hz. I am decimating the signal by 4. And I am considering 0.6 msec epoch. This gives me 38 samples per epoch per channel....
by openvibeexplorer
Thu Nov 11, 2021 3:54 am
Forum: Help for building the software
Topic: OV version - 3.2.0 build error
Replies: 4
Views: 6226

Re: OV version - 3.2.0 build error

Thank you for all the help.

Regards,
Swati.
by openvibeexplorer
Tue Nov 09, 2021 7:24 pm
Forum: Help for building the software
Topic: OV version - 3.2.0 build error
Replies: 4
Views: 6226

Re: OV version - 3.2.0 build error

Hello Thomas, Thanks for your prompt reply. I think it was just a matter of cleaning up the "build" folder. It looks like my build is successful now. I could not attach the log because the file size was big. So, I am uploading it at below location. https://drive.google.com/file/d/1w2YaFFBHTq_qjTdTIz...
by openvibeexplorer
Tue Nov 09, 2021 3:46 pm
Forum: Help for building the software
Topic: OV version - 3.2.0 build error
Replies: 4
Views: 6226

OV version - 3.2.0 build error

Hello, I am trying to build the new version of OV (3.2.0) released in end of Oct. I am getting the following error: error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MD_DynamicRelease' doesn't match value 'MT_StaticRelease' in ovCChrono.cpp.obj Could you please let me know if there is so...
by openvibeexplorer
Mon Aug 23, 2021 2:00 pm
Forum: Tutorial scenarios
Topic: UI issue with P300 Speller
Replies: 1
Views: 5931

UI issue with P300 Speller

Hello, I have downloaded the code for OpenVibe 3.1 and built it. I am facing one User Interface (UI) issue in the training scenario. I am elaborating the issue along with the screenshots below. Step 1 - When I open the list of classifiers for the first time, it appears as follows. (The default class...
by openvibeexplorer
Sun Jun 06, 2021 5:24 pm
Forum: Tutorial scenarios
Topic: Use of OpenVibe Stimulations for epoching
Replies: 3
Views: 6589

Use of OpenVibe Stimulations for epoching

Hello there, As far as I know, P300-Speller scenario uses "OVTK_StimulationId_Target" and "OVTK_StimulationId_NonTarget" stimulations during its "training" mode for epoching. P300-Speller also uses "OVTK_StimulationId_VisualStimulationStart" during its "online" mode for epoching. Question 1 - Should...
by openvibeexplorer
Thu Apr 08, 2021 5:12 am
Forum: Designer
Topic: Invoke Python Classifiers from OpenVibe
Replies: 1
Views: 6297

Invoke Python Classifiers from OpenVibe

Hello there, I have implemented a couple of python scripts for the following purposes: 1. Invoke python's Independent Component Analysis (ICA) and Principle Component Analysis (PCA) functions from OV scenario 2. Invoke python's Autoregressive Coefficients calculation functions from OV scenario 3. In...
by openvibeexplorer
Sat Mar 20, 2021 6:36 am
Forum: Boxes
Topic: AutoRegressive Coefficients - Seem to be large for a normalized signal
Replies: 1
Views: 6010

Re: AutoRegressive Coefficients - Seem to be large for a normalized signal

Just to conclude:

I wrote a python script to invoke python module of AR coefficients. And it gives similar results as OpenVibe's AR coefficients.
Which confirms the correct functioning of OV AR coefficients module.

Thanks!
openvibeexplorer.
by openvibeexplorer
Mon Mar 15, 2021 10:09 am
Forum: Boxes
Topic: AutoRegressive Coefficients - Seem to be large for a normalized signal
Replies: 1
Views: 6010

AutoRegressive Coefficients - Seem to be large for a normalized signal

Hello there, I have an EEG signal whose amplitude is normalized between -1 to +1 within each epoch. There are 256 samples within an epoch. Each epoch (256 samples) is an input to AutoRegressive box of order 5. I am getting following auto-regressive coefficients for a single epoch: 1,-4.78718,9.30318...
by openvibeexplorer
Wed Feb 10, 2021 3:49 pm
Forum: Acquisition server and drivers
Topic: Combining/Joining OpenVibe data files
Replies: 1
Views: 6003

Combining/Joining OpenVibe data files

Hello there, I would like to know if we can combine/join multiple OpenVibe data file (".ov" files) and make them into one huge file. I want to do group testing of my algorithm. Hence this requirement. If there is any other way to do grouping of data, please feel free to suggest. Regards, openvibeexp...
by openvibeexplorer
Thu Jan 28, 2021 1:11 pm
Forum: Tutorial scenarios
Topic: OpenVibe P300 Speller Online - No "Green" box displayed
Replies: 6
Views: 9148

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Hi there, - I fetched the whole git repository just yesterday. - I used the command "git submodule update --init --recursive" to fetch each submodule recursively. - I made sure there is no "build" and "dist" directory. - I also removed the "AppData\Roaming\openvibe-3.0.0\scenarios" and checked that ...